In groups, discuss the following question then write your conclusions into your note book In the pea plant, the characteristic of purple (P) flowers is dominant over white (p) while The color of the green pods (G) is dominant over yellow (g). Pollina- tion was carried out between two plants, both purple and green pods and hybrid. 1) Write the genotypes of the parents. 2) Write the genotypes of the gametes, and check their number using the fol- lowing code: The number of types of gametes = 2n, where 'n' is the hybrid traits. 3) Write the genotypes and the phenotype of first generation individuals.

In groups, discuss the following question then write your conclusions into your note book In the pea plant, the characteristic of purple (P) flowers is dominant over white (p) while The color of the green pods (G) is dominant over yellow (g). Pollina- tion was carried out between two plants, both purple and green pods and hybrid. 1) Write the genotypes of the parents. 2) Write the genotypes of the gametes, and check their number using the fol- lowing code: The number of types of gametes = 2n, where 'n' is the hybrid traits. 3) Write the genotypes and the phenotype of first generation individuals.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter19: The Evolution Of Populations

Section: Chapter Questions

Problem 18CTQ: Imagine you are trying to test whether a population of flowers is undergoing evolution. You suspect...

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Question:- For a simple cross between a purple-flowered plant and a white-flowered plant, where purple is dominant over white. a. Show the F2 in a Punnett square. What are the proportions of genotypes and phenotypes? Express as fractions, decimal fractions and ratios. b. Now imagine that half of the pollen carrying the recessive allele die before reaching their target, while those carrying the dominant allele are unaffected; what are the proportions of genotypes and phenotypes now?What does this tell you about Mendel’s principle of segregation?
WHAT IF? List all gametes thatcould be made by a pea plantheterozygous for seed color, seedshape, and pod shape (YyRrIi; seeTable 14.1). How large a Punnettsquare would you need to drawto predict the offspring of a selfpollination of this “trihybrid”?
5a) It is generally considered that blue or purplish colored flowers attract bees as pollinators. Red flowers often attract birds such as hummingbirds as pollinators. Is this an example of prezygotic or postzygotic isolating mechanisms? Why? 5b) The graphs in your textbook show that the parental species are partially isolated by living at somewhat different altitudes in the mountains. In nature, the two parental species are also strongly (but not completely) isolated by using different pollinators (bees vs. hummingbirds). Is the presence of altitudinal separation combined with different pollinators likely to give more reproductive isolation in nature compared to each isolating mechanism alone? Why? 5c) Do the figures showing the F2 generation of the flowers suggest that these traits of flower shape and flower color are polygenic or due to single gene loci? Give a reason for your answer. 5d) Looking at the other graphs for this example that are shown in your textbook, is there any…
Problem: A homozygous tall, homozygous white flower plant crosses with a homozygous short, homozygous purple flower plant. We know that the purple and tall flowers are the dominant traits. Show your work. What are the phenotypes of the offspring?
1. Leaf color of 4 o’clock plants depends on the type of chloroplasts found in the cytoplasm of leaf cells demonstrates _________. a.Delayed chromosomal inheritance b.Transposon c.Extrachromosomal inheritance d.Nucleocytoplasmic interaction 2. Given that f(B)= 0.8 in a certain stable population, what are the expected frequencies of the genotypes BB, Bb, and bb, respectively? a. 0.64, 0.32, 0.04 b. 0.04, 0.32, 0.64 c.0.70, 0.20, 0.10 d.0.75, 0.10, 0.15 3. Change in gene frequency due to migration is dependent upon a.The size of the recipient population bThe rate of migration c.Both B and D d.The differences in frequencies of the same gene between two populations.
Q: In a certain species of plants, violet flower color (V) is dominant over white flower color (v). If p = 0.4 and q = 0.6 in a population of 500 plants, I want you to explain why red is wrong and highlighted is right.
Questions: a. What is probability of producing tall plants with purple flowers? Possible genotype/s? b. What is the probability of producing dwarf plants with white flowers? Possible genotype/s? Using the Punnett square below as basis:
Imagine you are trying to test whether a population of flowers is undergoing evolution. You suspect there is selection pressure on the color of the flower: bees seem to cluster around the red flowers more often than the blue flowers. In a separate experiment, you discover blue flower color is dominant to red flower color. In a field, you count 600 blue flowers and 200 red flowers. What would you expect the genetic structure of the flowers to be?
INTERPRET DATA Compare the two graphs in Figure 1-17. What information does the second graph illustrate? What possible explanation can you give for the differences shown in the two graphs? (a) Number of chimpanzees who successfully employed specific method of tool use. (b) Number of chimpanzees who successfully employed learned method of tool use two months later. Figure 1-17 An experiment testing learning in chimpanzee populations In the photo, wild chimpanzees are shown observing a member of their group using a tool.
The crab spider, Thomisus spectabilis, sits on flowers and preys upon visiting honeybees. Do honeybees distinguish between flowers that have crab spiders and flowers that do not? To test this, Heiling et al. (2003) gave 34 bees a choice between 2 flowers: one with, and one without a crab spider. In 24 of the 34 trials, the bees picked the flower that had the spider. In the other trials, the bees chose the spiderless flower. With these data, carry out the appropriate hypothesis test (one- or two-tailed), using the normal approximation to the binomial distribution to determine Z. For a one-tailed test, use the formula =(1-NORM.DIST(Z,0,1,TRUE) in Excel calculate P. For a two-tailed test, use the formula =2(1-NORM.DIST(Z,0,1,TRUE). State your answer for the value of P to three decimal places, and include the leading zero. Do all of the math in Excel DO NOT round the value of Z. Substitute the cell (e.g. B1) for Z in the formula for P.
Biology Q 1: The following monohybrid cross is made: GG x gg (the parental generation). G (green seeds) is completely dominant to g (orange seeds). Along with this parental cross write out the F1 and the F2 generations. Indicate the genotypic and phenotypic ratios in each generation. (note: don't just give the ratio; for instance instead of writing just 1:1, write1 green: 1 orange or 1:1 green:orange.
F1 hybrids between two species of cotton, Gossypium barbadenseand Gossypium hirsutum, are very vigorous plants. However, F1crosses produce many seeds that do not germinate and a high percentageof very weak F2 offspring. Suggest two reasons for theseobservations.